A rod seal is a critical sealing component that prevents fluid leakage along the piston rod in hydraulic or pneumatic cylinders.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Speed | 0.5 m/s to 1.5 m/s (continuous) | |
| Hardness | 70 Shore A to 95 Shore A (elastomers) | |
| Rod Diameter | 6 mm to 500 mm (standard range) | |
| Clearance Gap | 0.1 mm to 0.3 mm (typical) | |
| Temperature Range | -40°C to +200°C (material dependent) | |
| Operating Pressure | Up to 40 MPa (hydraulic), 1.6 MPa (pneumatic) |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
Piston rod and cylinder assembly converting fluid pressure into linear motion in an oscillation actuator.
A sealing and structural component at the end of a hydraulic or pneumatic cylinder rod.
A critical assembly consisting of the piston rod and its sealing system that prevents fluid leakage while transmitting linear motion in drive mechanisms.
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Manufacturer profiles associated with Rod Seal.
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Rod seals seal the dynamic interface between the moving piston rod and stationary cylinder head, preventing external leakage. Piston seals seal between the moving piston and cylinder bore, preventing internal leakage across the piston. Both are critical but serve different locations and functions within the cylinder.
Replacement intervals depend on operating conditions: typically 1-5 years or 5,000-50,000 operating hours. Signs for replacement include visible leakage, fluid contamination, increased friction, or system pressure drop. Preventive maintenance schedules should consider manufacturer recommendations and operational severity.
Standard single-lipped rod seals are designed for pressure from inside the cylinder outward. Bidirectional pressure applications require special designs like symmetrical double-lipped seals or combination seals with bidirectional pressure rings to prevent seal collapse or extrusion.
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